the second amendment does not mention defense
and a folding stock does not make a gun more offensive and so what if a law abiding person has a large capacity magazine?
I don't agree with telling law abiding people they can't own a weapon because someday, maybe, some criminal somewhere might kill someone with the same type of weapon
If I can pass a check, and I can and have, I should be able to buy any rifle I want and any size magazine I want
Yeah, I don't know what that whole "security of a free state" is all about.
But it does not matter what you agree with. There is no constitutional protection to owning an AR-15. It has been adjudicated to the Federal Appeals level, not once, not twice, but three times. It has been confirmed by the SCOTUS.
And the government has been placing limits on weapons for quite some time, even magazine capacity. We were placing plugs in semi-auto shotguns almost fifty years ago, had a capacity limit when we were hunting.